Aquatic Biomes

Multiple Choice

What percentage of the Earth's Water is salt water?

• 75%
• 97%
• 3%
• 2%

Multiple Choice

What percentage of the Earth's fresh water is frozen?

• 75%
• 3%
• 2%
• 97%

Multiple Choice

The majority of FRESH LIQUID water on Earth is found

• In rivers
• In Lakes
• Underground
• Wetlands

Multiple Select

Freshwater Biomes include (check all)

• Ponds

• Lakes

• Streams

• Oceans

Multiple Choice

How do ecologists classify aquatic ecosystems?

• Salinity

• Depth

• Movement

• All of the above

Multiple Choice

Salinity refers to

• how many plants are in the water

• how many organisms live in the water

• how much salt in is water

Multiple Choice

What percent of total water on Earth is fresh?

• 1
• 2
• 3
• 97

Multiple Choice

Most freshwater is....

• Ground water
• Lakes
• Rivers
• Frozen 

Multiple Choice

How much of Earth's total water is easily available for human consumption?

• 23%
• 70%
• 3%
• Less than 1%

Multiple Choice

Which type of organism helps prevent erosion of stream banks?

• macroinvertebrates such as planaria

• darter fish

• sand-dwelling mollusks

• rooted plants

Multiple Choice

Bends in rivers are called meanders. How do they form?

• The fast moving water erodes the outer bank while slower water deposits sediment on the inner bank creating a curve

• Humans carve out a bend in the river

• Wind pushes the river to one side

• The fast moving water near the banks will erode sediment causing the river to bend

Multiple Choice

Sediment affects aquatic organisms by

• increasing the productivity of a smaller order stream.

• smothering them and destroying their habitat.

• increasing species diversity.

• reducing competition between aggressive species.

Open Ended

Describe the adaptations of an organism living in a fast-moving river.

Multiple Choice

These are lakes in mountain regions with clear water and few nutrients.

• estuarine
• oligotrophic
• eutrophic
• marine

Fill in the Blank

Mixing oxygenated water from the surface with nutrient rich water on the bottom of a lake

Multiple Choice

These are lakes in lowland areas with green water from phytoplankton and rich in nutrients.

• estuarine
• oligotrophic
• eutrophic
• marine

Open Ended

What are the conditions that can change an oligotrophic lake into a eutrophic lake?

Draw

Illustrate how a eutrophic lake may become an oligotrophic one. Think about what conditions you need to show.

Multiple Choice

Lakes are divided into zones. These zones are based on

• the size of the lake

• the availability of sunlight

• the pressure of the lake

• the vegetation that lives there

Multiple Choice

This zone is found at the bottom of a lake

• Littoral

• Limnetic

• Profundal

• Benthic

Multiple Choice

This zone covers the surface of the lake and is known as the photic zone.

• Littoral

• Limnetic

• Profundal

• Benthic

Multiple Choice

The part of a lake that is shallow enough to support rooted aquatic plants.

• littoral zone

• benthic zone

• aphotic zone

• limnetic zone

Multiple Choice

The part of a lake that is shallow enough to support rooted aquatic plants.

• littoral zone

• benthic zone

• aphotic zone

• limnetic zone

Multiple Choice

_________________ is the open water zone where rooted plants do not grow.

• littoral

• lentic

• limnetic

• lowly

Multiple Choice

Photosynthetic organisms are found mainly in shallow water due to the availability of

• oxygen

• nutrients

• sunlight

• salt

Multiple Choice

Area in a body of water where it is cool and dark and bottom-feeders are located.

• Littoral Zone

• Benthic Zone

• Limnetic Zone

Multiple Choice

Most reproductive region of a lake

• Limnetic zone

• Benthic zone

• Littoral zone

• Profundal zone

Multiple Choice

From the surface to the deepest, which is the correct position of the 3 zones of lakes and ponds?

• Littoral , Profundal, Limnetic

• Profundal, Limnetic, Littoral

• Profundal, Littoral, Limnetic

• Littoral, Limnetic, Profundal

Multiple Choice

The aphotic zone is

• the ocean's dark lower layer where photosynthesis cannot occur
• the sunlit upper layer of the ocean where photosynthesis occurs
• on the bottom of lakes, streams, and oceans.
• where benthos are found

Multiple Choice

List the functions of a wetland:

• Provides a habitat

• filter water

• create buffer zones

• all of the above

Multiple Choice

What is a simple definition of a wetland?

• low lying lands with spongy soil that are wet all the  time every year
• low lying lands with spongy soil that are wet for a certain time every year
• high lands with spongy soil that are wet for a certain time every year
• low lying lands with moist soil that are wet all the  time every year

Multiple Choice

An estuary is best defined as a place where

• fresh and salt water meet.

• a river meets a lake.

• a group of animals are gathered.

• the water from the land flows into a river.

Multiple Choice

When salt and fresh water mix, what is the new water substance called?

• Brackish Acid
• Fresh Water
• Salt Water
• Brackish Water

Multiple Choice

Which of the following are types of estuaries?

• Bays.

• Lagoons.

• Mangrove swamps.

• All of the above.

Multiple Choice

Bays, lagoons, salt marshes, mudflats, and mangrove swamps are all types of

• freshwater wetlands.

• lakes.

• bogs.

• estuaries.

Multiple Choice

Why are estuaries important?

• They provide homes for many species of wildlife.

• They are important nursery areas for a variety of marine life.

• They help to filter pollutants from the water.

• All of the above.

Multiple Choice

What is the original source of almost all energy in most ecosystems?

• carbohydrates
• sunlight
• water
• carbon

Multiple Choice

The arrangement of organisms in the open ocean is determined by the

• increase in salt content from shallow to deep waters.

• size of the benthic zone, where photosynthesis occurs.

• amount of nutrients and sunlight that are available.

• distribution of zooplankton.

Multiple Choice

Which ecosystem has the highest level of salinity?

• ocean

• brackish marsh

• river

• pond

Multiple Choice

Which of the following is a threat to coral reefs?

• oil spills

• sewage

• pesticides

• All of the above

Multiple Choice

Why doesn’t photosynthesis occur in deep ocean water?

• The water temperature is too cold.

• There is no sunlight.

• There are not enough nutrients.

• The salinity level of the water is too high.

Multiple Choice

Tiny free-floating animals that live in water are called

• phytoplankton.

• algae.

• zooplankton.

• protists

Multiple Choice

Which of the following is a factor that influences where an organism lives in an aquatic ecosystem

• sunlight

• nutrient availability

• temperature

• all of the above

Multiple Choice

Area where land meets the ocean. Fluctuates in size between low and high tides.

• Pelagic Zone

• Intertidal Zone

• Benthic Zone

• Abyssal Zone

Multiple Choice

Area that consists of the water column of the open ocean, and can be further divided into regions by depth. "Open Sea" in Greek.

• Pelagic Zone

• Intertidal Zone

• Benthic Zone

• Abyssal Zone

Multiple Choice

Area at the lowest level of a body of water such as an ocean, lake, or stream, including the sediment surface and some sub-surface layers. Depth can vary.

• Pelagic Zone

• Intertidal Zone

• Benthic Zone

• Abyssal Zone

Multiple Choice

Area of the ocean characterized by continuous cold, lack of nutrients and light, and high pressure.

• Pelagic Zone

• Intertidal Zone

• Benthic Zone

• Abyssal Zone

Multiple Choice

The production of organic compounds by bacteria or other living organisms using energy from reactions involving inorganic chemicals, typically in the absence of sunlight.

• Chemosynthesis

• Photosynthesis

• Respiration

• Carbon Fixation

Multiple Choice

Surface layer of the ocean that receives sunlight. The uppermost 80 m (260 feet) or more of the ocean.

• Aphotic Zone

• Photic Zone

• Pelagic Zone

• Luminous Zone

Multiple Choice

The portion of a lake or ocean where there is little or no sunlight. It is formally defined as the depths beyond which less than 1% of sunlight penetrates

• Photic Zone

• Benthic Zone

• Abyssal Zone

• Aphotic Zone

Fill in the Blank

The marine zone closest to shore is called